South Korea experienced its hottest day on record on Tuesday, when the meteorological station in the southeastern city of Yangsan logged a temperature of 42.5 °C (108.5 °F). The reading broke a 122‑year national record and triggered a nationwide emergency heatwave alert, with officials ordering an immediate halt to all outdoor activities and warning that indoor environments lacking air‑conditioning are "dangerous".
Record temperature and official response
The 42.5 °C measurement, recorded at 1:26 pm local time, was confirmed by the Korea Meteorological Administration and reported by multiple outlets, including The Guardian and Phys.org. The alert, described as "extreme heat" by the government, is the highest level of warning in the country's heat‑wave response system and was issued for the fifth consecutive day that temperatures exceeded 40 °C across much of the peninsula.
"Yangsan recorded 42.5 °C at 1:26 pm, the highest temperature ever measured in the country’s 122‑year meteorological record," NewsCord reported.
Under the emergency order, schools, government offices and public parks were instructed to close, and citizens were urged to stay indoors, hydrate frequently, and avoid exertion. The Ministry of Health warned that prolonged exposure could lead to heat‑related illnesses, especially among the elderly and those without access to cooling facilities.
Impact on public life and health warnings
Across major urban areas, including Seoul and Busan, the heat advisory prompted a temporary suspension of outdoor construction work, sports events and street markets. The Korean Broadcasting System (KBS) relayed the government's directive to "stop all outdoor activities" and advised that indoor spaces without air‑conditioning be considered hazardous. The Australian Broadcasting Corporation highlighted that the alert also covered public transportation hubs, where ventilation may be insufficient.
Health officials emphasized the risk of heatstroke and dehydration, urging residents to check on vulnerable neighbours. Hospitals in the capital reported a surge in emergency calls related to heat exhaustion, prompting the deployment of additional medical staff and cooling stations in public spaces.
Wider context and historical significance
The record heat comes amid a series of extreme weather events worldwide, which Al Jazeera linked to a broader pattern of rising global temperatures. The Korean peninsula, typically experiencing hot, humid summers, has seen an intensification of heatwaves over the past decade, with climate scientists warning that such extremes could become more frequent.
According to Reuters, the heatwave has spread across both South and North Korea, prompting coordinated monitoring efforts. While the 42.5 °C reading is widely accepted, some outlets, such as the Korea Times, noted that the temperature was recorded in Yangsan, a city in the Gyeongsangnam-do province, emphasizing the regional nature of the peak.
Historical records indicate that the previous national high, set in 1942, stood at 41.0 °C. The new figure surpasses that benchmark by 1.5 °C, underscoring the unprecedented nature of the event. The NewsCord analysis suggested the 122‑year record underscores a shift in climatic baselines, with implications for energy demand, water resources and public health policy.
Authorities have pledged to maintain heightened vigilance as the heatwave persists, with daily updates from the Korea Meteorological Administration and potential extensions of the emergency alert if temperatures remain elevated. The government is also reviewing long‑term strategies to enhance urban cooling infrastructure and reduce vulnerability to future heat extremes.
